| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <canvas id="canvas" width="200" height="200"></canvas> |
| <script> |
| |
| var ctx = document.getElementById('canvas').getContext('2d'); |
| |
| function checkResult(expectedColors, sigma) { |
| data = ctx.getImageData(50, 50, 1, 1).data; |
| for (var i = 0; i < 4; i++) |
| assert_approx_equals(data[i], expectedColors[i], sigma); |
| } |
| |
| function drawRectanglesOn(contextOrPath) { |
| contextOrPath.rect(0, 0, 100, 100); |
| contextOrPath.rect(25, 25, 50, 50); |
| } |
| |
| function testClipWith(fillRule, path) { |
| ctx.fillStyle = 'rgb(255,0,0)'; |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| ctx.fillStyle = 'rgb(0,255,0)'; |
| if (path) { |
| if (fillRule) { |
| ctx.clip(path, fillRule); |
| } else { |
| ctx.clip(path); |
| } |
| } else { |
| ctx.beginPath(); |
| drawRectanglesOn(ctx); |
| if (fillRule) { |
| ctx.clip(fillRule); |
| } else { |
| ctx.clip(); |
| } |
| } |
| ctx.beginPath(); |
| ctx.fillRect(0, 0, 100, 100); |
| if (fillRule == 'evenodd') { |
| checkResult([255, 0, 0, 255], 5); |
| } else { |
| checkResult([0, 255, 0, 255], 5); |
| } |
| } |
| |
| test(function(t) { |
| fillRules = [undefined, 'nonzero', 'evenodd']; |
| path = new Path2D(); |
| drawRectanglesOn(path); |
| |
| for (var i = 0; i < fillRules.length; i++) { |
| testClipWith(fillRules[i]); |
| testClipWith(fillRules[i], path); |
| } |
| |
| // Test exception cases. |
| assert_throws_js(TypeError, function() { |
| ctx.clip(null); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(null, null); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(null, 'nonzero'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(path, null); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip([], 'nonzero'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip({}, 'nonzero'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(null, 'evenodd'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip([], 'evenodd'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip({}, 'evenodd'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip('gazonk'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(path, 'gazonk'); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(undefined, undefined); |
| }); |
| assert_throws_js(TypeError, function() { |
| ctx.clip(undefined, 'nonzero'); |
| }); |
| }, 'Series of tests to ensure clip() works with path and winding rule parameters.'); |
| </script> |
| </body> |
